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조기 간세포암종에서 간동맥 색전술과 경피적 고주파열 병합치료
임준욱 ( Jun Uk Lim ),신현필 ( Hyun Phil Shin ),이정일 ( Joung Il Lee ),박재준 ( Jae Jun Park ),전정원 ( Jung Won Jeon ),임규성 ( Kyu Seong Lim ) 대한간암학회 2012 대한간암학회지 Vol.12 No.1
In most early hepatocellular carcinoma (HCC), surgical resection or liver transplantation is the first choice of treatment. However, surgery is often impossible because of patient`s physical condition such as advanced liver cirrhosis, other comorbidities, and radiofrequency ablation (RFA) can be used as substitute treatment. Recently, it has been reported that clinical outcomes of transarterial chemoembolization (TACE) combined with RFA were similar to that of surgical resection. This report describes a 49-year-old male with 1.5 cm sized HCC. Because the patient could not undergo surgical resection and the tumor was not localized on ultrasonography (US), TACE was performed instead. But the residual tumor was still detected on follow-up contrast enhanced US, we performed additional RFA. After combined treatment with TACE and RFA, viable portion of the tumor was not detected on one month follow-up CT and MRI image. The patient remains well without recurrence, 12 months after combined treatment. It is suggested that TACE combined with RFA can be an alternative choice of early small HCC treatment.
국가 암검진 사업의 대장암 선별검사로 시행한 면역화학 분변잠혈검사의 의의
임준욱 ( Jun Uk Lim ),배나영 ( Na Young Bae ),송원경 ( Won Koung Song ),차재명 ( Jae Myung Cha ),이정일 ( Joung Il Lee ) 대한장연구학회 2010 Intestinal Research Vol.8 No.2
Background/Aims: Colorectal cancer (CRC) is one of the major causes of death and poses a major public health concern. The National CRC Screening Programme (NCSP) provides annual CRC screening using a fecal occult blood test for individuals >50 years of age since 2004. The purpose of the current study was to determine the outcomes and efficacy of a fecal immunochemical test (FIT) based on the NCSP in a quality-controlled university hospital setting. Methods: We retrospectively reviewed the medical records and a standardized questionnaire from the NCSP of 3,852 individuals who underwent a FIT between March and December 2009. All of the subjects submitted a stool specimen for a FIT, while a double-contrast barium enema or colonoscopy was performed as a confirmatory examination for FIT-positive individuals. The CRC screening rate and rate of detection colorectal adenomas, advanced adenomas, and colorectal cancers by FIT were evaluated. Results: The CRC screening rate with FIT was very high (72.3%), but the positive rate of detection by FIT was only 1.3%. The rate of detection for colorectal cancers, adenomas, and advanced adenomas by FIT was 0.08%, 0.39%, and 0.13%, respectively. The quantitative values of FIT in individuals with colorectal adenomas and cancers were significantly higher than other colorectal diseases. Men (P=0.001) and elderly individuals (P=0.039) were significantly more common in the FIT-positive group than the FIT-negative group. Approximately 28% of the subjects with FIT-positive tests did not receive a confirmatory examination. Conclusions: Although the FIT had a low rate of detection, the FIT was a useful screening tool for detection of CRC in the NCSP. It will be important to increase CRC screening rates and confirmatory examination rates. (Intest Res 2010;8:126-134)
Clinical Characteristics and Outcomes of Diverticulitis by Physician`s Specialty
( Seung Jung Jun ),( Jae Myung Cha ),( Joung Il Lee ),( Kwang Ro Joo ),( Hyun Phil Shin ),( Jae Jun Park ),( Jung Won Jeon ),( Jun Uk Lim ),( Yoon Jong Seo ),( Soo Young Moon ),( Chi Hoon Lee ) 대한장연구학회 2013 Intestinal Research Vol.11 No.2
Background/Aims: Several factors affecting the severity and outcomes of diverticulitis have been reported, but there is little research on physician specialty related with this disease. Therefore, we evaluated the clinical characteristics and outcomes of diverticulitis depending on physician`s specialty. Methods: Medical records of 239 patients, who had been hospitalized with first-diagnosed acute colonic diverticulitis at Kyung Hee University Hospital in Gang Dong (Seoul, Korea) from June 2006 to December 2012, were retrospectively analyzed. The patients were classified according to whether they had been managed by gastroenterologists or not. Clinical characteristics and treatment outcomes were compared between two groups. Results: Of these 239 patients, 38 (15.9%) patients were treated by a gastroenterologist and 201 (84.1%) patients by a non-gastroenterologist. Clinical characteristics such as age, gender, body mass index, comorbidity, medication, laboratory results, recurrence and complication were not significantly different between two groups. However, right-sided diverticulitis predominated in the nongastroenterologist group (79% vs . 91%, P =0.028). From the sub-group analysis of uncomplicated diverticulitis, intravenous antibiotics was used for a shorter period of time by gastroenterologists than non-gastroenterologists (3.3±1.9 days vs . 4.4±2.8 days, P =0.032). Multivariate logistic regression analysis showed that the 3 day administration of intravenous antibiotics significantly depended on the physician`s specialty (odds ratio 7.984, 95% confidence interval 1.990-32.043, P =0.003). Conclusions: The results suggest that the duration of intravenous antibiotics for treating uncomplicated colonic diverticulitis was shortened by gastroenterology specialists without increasing operation or recurrence. (Intest Res 2013;11:92-99)
Enhanced performance of semi-transparent OPV with nanoparticle reflectors
Lim, Se Jin,Kim, Dong Uk,Song, Jun-Ho,Yu, Jae-Woong Elsevier 2018 ORGANIC ELECTRONICS Vol.59 No.-
<P><B>Abstract</B></P> <P>In order to overcome the decreased power conversion efficiency of semi-transparent organic solar cells, methods to prepare a simple external reflection layer were studied. A reflective layer was formed by blending a polymer with high refractive index materials and was fabricated on top of the device to enhance the power conversion efficiency of the semi-transparent device. When silver coated exfoliated montmorillonite, aluminum oxide nano-particles, or magnesium oxide nano-particles were used as a reflective layer material, the enhancement in power conversion efficiency was imperceptible. A reflective layer formed by blending polymer and gold nanoparticles was tried to enhance the power conversion efficiency based on the plasmonic effect of gold. Two different sizes (2 nm and 30 nm in diameter) of gold nanoparticles were used as reflective layers to fabricate OPV devices and both devices showed an approximately 20% power conversion efficiency increase compared to the reference semi-transparent device. Better enhancement of power conversion efficiency was obtained by combining the gold plasmonic effect and the scattering effect from a reflective layer formed with a 1:1 mixture of 2 nm and 30 nm gold nanoparticles. Devices with the gold nanoparticle mixture layer as a reflective layer showed about 50% improvement in power conversion efficiency compared to the reference device. The process for preparing this polymer reflective layer is very simple and inexpensive to manufacture.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A simple reflector film for semi-transparent OPV was developed. </LI> <LI> Reflector film with gold nanoparticles showed enhanced conversion efficiency. </LI> <LI> Mixing different size gold nanoparticles showed more enhanced efficiency. </LI> <LI> Plasmonic effect and scattering effect were combined for mixed gold nanoparticles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
기존 정수처리공정에서 이취미처리 및 최적 약품투입을 위한 기초연구
임봉수,전항배,배병욱 대한상하수도학회 1996 상하수도학회지 Vol.10 No.4
This study was accomplished to get the basic data for the optimum chemical feed, evaluating interference between tastes and odors chemicals and coagulants in existing water treatment processes. During the tastes and odors occurs at D intaking tower area in 1995, PAC(Powdered Activated Carbon) feed with coagulants was PAC feed only and with coagulant simultaneously were appeared TON removal efficiency about 84%-87% within 20 min reaction time, but feed with time intervals was about 98% TON removal efficiency. Therefore in the case of PAC feed with coagulant, it is effective to feed coagulant on some time intervals in removing tastes and odors. It is not effective to feed PAC with chlorine dioxide(CIO_2) or chlorine simultaneously in removing tastes and odors, because these chemicals were reduced the adsorption capacity of PAC.